DD

Donald D. DeFord

PP Phillips Petroleum: 2 patents #574 of 1,401Top 45%
📍 Evanston, IL: #730 of 1,719 inventorsTop 45%
🗺 Illinois: #34,584 of 84,256 inventorsTop 45%
Overall (All Time): #2,371,381 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4283201 Method and apparatus suitable for repeated, accurate chemical analyses Edwin K. Clardy, Edward Nelson Fuller 1981-08-11
4181006 Quantitative chromatographic analysis without calibration 1980-01-01